Introduction to Backbone.js—
Nick Gauthier presents a comprehensive 90 minute introduction to Backbone going from the absolute basics to building an app. Audio quality not great but otherwise superb for free.

string.js: Extra String Methods for JavaScript—
Comes as a Node module (but can be used in the browser) and gives you a ton of features, including whitespace collapsing, content querying, camel casing, CSV parsing, and conversion.

Rockstar JavaScript/HTML5 Developer (New York, NY)— Undertone is looking for a rockstar JavaScript/HTML5 Developer to join our tech team and help develop the next big thing in video and rich media. If you have expert knowledge of JavaScript and 1+ years experience with HTML5 and CSS3 we want to hear from you. Email jsheth@undertone.com for details.